CVE-2006-1748 in XMB
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in XMB Forum 1.9.5 allows remote attackers to inject arbitrary web script or HTML by uploading a Flash (.SWF) video that contains a getURL function call, which causes the video to be rendered without disabling ActionScript.
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Analysis
by VulDB Data Team • 07/24/2018
The vulnerability described in CVE-2006-1748 represents a critical cross-site scripting flaw within the XMB Forum 1.9.5 platform that enables remote attackers to execute malicious web scripts through carefully crafted Flash multimedia content. This security weakness stems from the forum's improper handling of uploaded Flash files, specifically failing to adequately sanitize or restrict ActionScript execution within .SWF files. The vulnerability operates by allowing attackers to embed malicious getURL function calls within Flash videos, which then execute when the content is rendered on users' browsers, effectively bypassing standard security measures designed to prevent script injection attacks.
The technical implementation of this vulnerability involves the exploitation of Flash Player's ActionScript capabilities within the forum's media handling system. When users upload .SWF files containing malicious getURL function calls, the system processes these files without properly disabling ActionScript execution or sanitizing the embedded code. This flaw directly maps to CWE-79, which categorizes cross-site scripting vulnerabilities as weaknesses that allow attackers to inject malicious scripts into web applications viewed by other users. The vulnerability demonstrates a classic failure in input validation and output encoding, where the forum application fails to properly filter or escape user-supplied content before rendering it within web pages.
The operational impact of this vulnerability extends beyond simple script injection, creating a significant risk for forum users and administrators alike. When victims view infected Flash content, the embedded malicious code can execute within their browser context, potentially stealing session cookies, redirecting users to phishing sites, or performing unauthorized actions on their behalf. This attack vector is particularly dangerous because it leverages legitimate multimedia content that users expect to be safe, making social engineering attacks more effective. The vulnerability affects the integrity and confidentiality of user data, as attackers can exploit the XSS flaw to impersonate users or access sensitive information stored within the forum environment.
Organizations and system administrators should implement multiple layers of defense to mitigate this vulnerability. Immediate remediation requires updating the XMB Forum to a version that properly sanitizes Flash content or disables ActionScript execution for uploaded multimedia files. The implementation of Content Security Policy headers can provide additional protection by restricting script execution within the forum environment. Network-based security controls such as web application firewalls should be configured to detect and block suspicious Flash content containing potentially malicious getURL function calls. Additionally, user education about the risks of viewing untrusted multimedia content and regular security audits of uploaded files can help prevent exploitation. This vulnerability aligns with ATT&CK technique T1566, which describes the use of malicious files to establish initial access through social engineering, and T1059, which covers the execution of malicious code through various attack vectors including web-based exploits. The remediation process should also include implementing proper file type validation, content scanning, and access controls to prevent unauthorized uploads that could compromise the entire forum infrastructure.